Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-15
Int.J.Mod.Phys.A21S1:127-131,2006
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, to appear in the proceedings of the 1st International ARENA Workshop, May 17-19th, 2005, DESY Zeuthen
Scientific paper
10.1142/S0217751X06033490
Experiments were performed at a proton accelerator and an infrared laser acility to investigate the sound generation caused by the energy deposition of pulsed particle and laser beams in water. The beams with an energy range of 1 PeV to 400 PeV per proton beam spill and up to 10 EeV for the laser pulse were dumped into a water volume and the resulting acoustic signals were recorded with pressure sensitive sensors. Measurements were performed at varying pulse energies, sensor positions, beam diameters and temperatures. The data is well described by simulations based on the thermo-acoustic model. This implies that the primary mechanism for sound generation by the energy deposition of particles propagating in water is the local heating of the media giving rise to an expansion or contraction of the medium resulting in a pressure pulse with bipolar shape. A possible application of this effect would be the acoustical detection of neutrinos with energies greater than 1 EeV.
Anton Gisela
Graf Kay
Hoessl Juergen
Kappes Alexander
Karg Timo
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